diff --git a/CHANGELOG.md b/CHANGELOG.md
index cb5a516..93f16be 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,12 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [0.5.0] - 2026-10-29
+
+This release adds staged (phased) Xbar and S charts, computed per stage as Dr. Bishop
+specified (2026-10-18), with `phase_statistics()` for the numbers behind each stage on both
+chart families. A column of values with no time is now charted in the order received.
+
 ### Added
 - **A bare response is charted in the order received.** `formulate(response=...)` with no time,
   factors or plan used to be refused. The values are now numbered 1..N in an `Observation` column
@@ -1175,7 +1181,8 @@ and may change between minor versions until 1.0.
 - `natsort >= 8.0`
 - `plotly >= 5.18, < 7`
 
-[Unreleased]: https://github.com/cnicholas/processbehavior/compare/v0.4.0...HEAD
+[Unreleased]: https://github.com/cnicholas/processbehavior/compare/v0.5.0...HEAD
+[0.5.0]: https://github.com/cnicholas/processbehavior/compare/v0.4.0...v0.5.0
 [0.4.0]: https://github.com/cnicholas/processbehavior/compare/v0.3.3...v0.4.0
 [0.3.3]: https://github.com/cnicholas/processbehavior/compare/v0.3.2...v0.3.3
 [0.3.2]: https://github.com/cnicholas/processbehavior/compare/v0.3.1...v0.3.2
diff --git a/CITATION.cff b/CITATION.cff
index 72837a9..7d1b395 100644
--- a/CITATION.cff
+++ b/CITATION.cff
@@ -17,7 +17,7 @@ authors:
 repository-code: "https://github.com/cnicholas/processbehavior"
 url: "https://cnicholas.github.io/processbehavior/"
 license: Apache-2.0
-version: 0.2.0
+version: 0.5.0
 keywords:
   - statistical process control
   - process behavior charts
diff --git a/docs/reference/validation.md b/docs/reference/validation.md
index 77af8e1..0252b51 100644
--- a/docs/reference/validation.md
+++ b/docs/reference/validation.md
@@ -8,7 +8,7 @@ and the run fails if any of them disagree.
 
 **1547 assertions pass**, 0 fail, 4 have no reference value yet.
 
-Generated by `validation/e2e_bishop_report.py` from processbehavior 0.4.0.
+Generated by `validation/e2e_bishop_report.py` from processbehavior 0.5.0.
 
 ## Coverage
 
diff --git a/processbehavior/__init__.py b/processbehavior/__init__.py
index f4776db..b74e4b5 100644
--- a/processbehavior/__init__.py
+++ b/processbehavior/__init__.py
@@ -47,7 +47,7 @@
 prefix (e.g. ``sds_detector.py``); the model itself is three-state.
 """
 
-__version__ = '0.4.0'
+__version__ = '0.5.0'
 
 # Result object
 from processbehavior.analysis_result import AnalysisResult